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/*
** strtok.c
**
** Ullrich von Bassewitz, 11.12.1998
*/
#include <string.h>
/*****************************************************************************/
/* Data */
/*****************************************************************************/
/* Memory location that holds the last input */
static char* Last = 0;
/*****************************************************************************/
/* Code */
/*****************************************************************************/
char* __fastcall__ strtok (register char* s1, const char* s2)
{
char c;
char* start;
/* Use the stored location if called with a NULL pointer */
if (s1 == 0) {
s1 = Last;
}
/* If s1 is empty, there are no more tokens. Return 0 in this case. */
if (*s1 == '\0') {
return 0;
}
/* Search the address of the first element in s1 that equals none
** of the characters in s2.
*/
while ((c = *s1) && strchr (s2, c) != 0) {
++s1;
}
if (c == '\0') {
/* No more tokens found */
Last = s1;
return 0;
}
/* Remember the start of the token */
start = s1;
/* Search for the end of the token */
while ((c = *s1) && strchr (s2, c) == 0) {
++s1;
}
if (c == '\0') {
/* Last element */
Last = s1;
} else {
*s1 = '\0';
Last = s1 + 1;
}
/* Return the start of the token */
return start;
}
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